《机电传动控制》模块化实验装置设计

AbstractIn the electromechanical drive control system,there are many motor control algorithms and means,the earliest developed simulation PID control has already formed a typical structure.However,once its parameters are set,the system cannot be changed in the process of operation.However,in fact,it is difficult to obtain the ideal control effect for the general system due to the changes of parameters and temperature.With the rise of electronic computers,there are many intelligent control,digital PID technology has also developed rapidly,which not only meets the simulation PID control task,but also has the advantages of flexible control algorithm and high reliability.Each functional unit of the system is independent and modularized.The digital PID as the core control algorithm and 51 singlechip microcomputer as the system controller generate the PWM pulse of duty cycle controlled by digital PID,so as to realize the control of dc motorspeed or displacement,and constitute a displacement followup system.At the same time,halldevice is used to convert the current speed of the motor into pulse frequency and feed back to the singlechip microcomputer to realize the closedloop control and achieve the purpose of speed detection.LCD1602 is also used as the display device in the system.The positive and negative rotation and acceleration and deceleration control of the motor are realized through independent keys,and the parameters of P,I and D are set.The current state of the motor can beunderstood through the display components after the system is started.Key Words:modularity;PID;control;electromechanical drive